CN217485277U

CN217485277U - Externally-wound current transformer with high winding precision

Info

Publication number: CN217485277U
Application number: CN202123309070.XU
Authority: CN
Inventors: 肖维; 刘琦
Original assignee: Zhuhai Jiahe Electrical Equipment Co ltd
Current assignee: Zhuhai Jiahe Electrical Equipment Co ltd
Priority date: 2021-12-27
Filing date: 2021-12-27
Publication date: 2022-09-23
Anticipated expiration: 2031-12-27

Abstract

The utility model discloses a belong to current transformer technical field, specifically be an outer winding current transformer that winding precision is high, which comprises a housin, casing top plug terminal board, first internal thread hole has been seted up on the terminal board, be equipped with first winding ring and second winding ring in the casing, the spring-type groove has been seted up on the second winding ring, the winding has first winding on the spring-type groove, be equipped with first plug in the first winding ring, be equipped with the second plug in the second winding ring, the beneficial effects of the utility model are that: first winding and second winding are respectively along the spring-type groove winding formation on the spring-type groove on the second winding ring and the spring-type groove winding on the first winding ring, and the winding precision is high, can not shift, and water-proof effects is good, and the heat of production passes through the heat conduction silica gel filler and transmits for the bottom plate, realizes the heat dissipation to first plug, second winding, first winding ring second plug, first winding and second winding ring, and the radiating effect is good.

Description

Externally-wound current transformer with high winding precision

Technical Field

The utility model relates to a current transformer technical field specifically is a high outer wound current transformer of winding precision.

Background

The current transformer is an instrument for measuring by converting a large primary side current into a small secondary side current according to the electromagnetic induction principle. The current transformer is composed of a closed iron core and a winding. The primary side winding of the transformer has few turns and is connected in a circuit of current to be measured in series; the current magnitude is very different in the lines of electricity generation, transformation, transmission, distribution and utilization, from several amperes to tens of thousands of amperes. In order to facilitate the measurement, protection and control, the current needs to be converted into a uniform current, and the voltage on the line is high in general, so that direct measurement is dangerous. The current transformer plays the role of current transformation and electric isolation.

The existing current transformer is directly wound on a circular ring by a copper wire to form a winding, so that the winding precision is low and the heat dissipation effect is poor; and when the current is supplied, the winding is influenced by the current to generate deformation and displacement, so that the winding precision is further deteriorated.

SUMMERY OF THE UTILITY MODEL

In view of the problem that exists among the outer wound current transformer that a winding precision is high now, provided the utility model discloses.

Therefore, the utility model aims at providing an outer winding type current transformer with high winding precision, utilize heat conduction silica gel filler to seal the winding, and dispel the heat through the heat conduction stick on bottom plate and the bottom plate, and set up the recess of spring form in the ring, let the copper line twine along the recess, make the winding precision high, even the winding deformation can not influence the winding precision, solved current transformer, form the winding by the copper line winding on the ring directly, the winding precision is not high, the radiating effect is poor; and when the current is supplied, the winding can be influenced by the current to generate deformation and displacement, and the winding precision is further deteriorated.

In order to solve the technical problem, according to the utility model discloses an aspect, the utility model provides a following technical scheme:

an externally-wound current transformer with high winding precision comprises a shell, wherein a terminal board is inserted at the top end of the shell, a first internal threaded hole is formed in the terminal board, a first winding ring and a second winding ring are arranged in the shell, a spring groove is formed in the second winding ring, a first winding is wound on the spring groove, a first core rod is arranged in the first winding ring, a second core rod is arranged in the second winding ring, the bottom end of the shell is fixedly connected with a bottom plate, heat-conducting silica gel filler is filled in the shell, the first winding ring and the second winding ring are both located in the heat-conducting silica gel filler, the first winding ring and the second winding ring have the same structure, and a second winding is wound on the outer wall of the shell;

the bottom plate bottom is provided with a partition plate through bolts, the bottom plate bottom is provided with heat dissipation rods in an integrated mode at equal intervals, and the partition plate is provided with through holes at equal intervals.

As a high outer winding current transformer's of winding precision preferred scheme, wherein: the integrated forming of the top wall of the shell is provided with a plug-in post, the bottom end of the terminal board is provided with a plug-in groove, and the inner wall of the plug-in groove is plugged with the plug-in post.

As an outer winding current transformer's that winding precision is high preferred scheme, wherein: the first winding and the second winding are formed by winding the same wire.

As a high outer winding current transformer's of winding precision preferred scheme, wherein: the bottom end of the bottom plate is provided with a second internal thread hole, and the two ends of the partition plate are provided with a third internal thread hole and a nut groove.

As a high outer winding current transformer's of winding precision preferred scheme, wherein: a cavity is arranged between the partition plate and the bottom plate, and the heat dissipation rods are located in the cavity.

As a high outer winding current transformer's of winding precision preferred scheme, wherein: mounting holes are formed in the two ends of the shell.

As a high outer winding current transformer's of winding precision preferred scheme, wherein: the mounting holes at the two ends of the shell are at least provided with two groups.

Compared with the prior art:

1. the first winding and the second winding are respectively formed by winding along the spring-shaped groove on the second winding ring and the spring-shaped groove on the first winding ring, the winding precision is high, and the displacement cannot occur;

2. the first core rod, the second winding, the first winding ring, the second core rod, the first winding and the second winding ring are wrapped by the heat-conducting silica gel filler, the waterproof effect is good, the generated heat is transmitted to the bottom plate through the heat-conducting silica gel filler, the first core rod, the second winding, the first winding ring and the second winding ring are cooled, and the cooling effect is good;

3. the bottom of the bottom plate is provided with the heat dissipation rod, so that the surface area of the bottom plate is increased, and the heat dissipation effect is enhanced.

Drawings

Fig. 1 is a schematic structural diagram provided by the present invention;

FIG. 2 is an enlarged view of the point A in FIG. 1 according to the present invention;

fig. 3 is an enlarged view of the point B in fig. 1 according to the present invention;

fig. 4 is a schematic structural diagram of a second winding ring according to the present invention.

In the figure: the heat dissipation structure comprises a shell 1, a plug column 11, a terminal plate 2, a first internal thread hole 21, a plug groove 22, a bottom plate 3, a mounting hole 31, a second internal thread hole 32, a cavity 33, a heat dissipation rod 34, a partition plate 4, a through hole 41, a nut groove 42, a third internal thread hole 43, a heat conduction silica gel filler 5, a second core rod 6, a first winding 61, a second winding ring 62, a spring-shaped groove 621, a first core rod 8, a second winding 81 and a first winding ring 82.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention clearer, embodiments of the present invention will be described in further detail with reference to the accompanying drawings.

The utility model provides an external winding type current transformer with high winding precision, please refer to fig. 1-4, which comprises a shell 1, wherein the shell 1 is used for wrapping and protecting a first core rod 8, a second winding 81, a first winding ring 82, a second core rod 6, a first winding 61 and a second winding ring 62, two ends of the shell 1 are respectively provided with a mounting hole 31 for mounting and fixing the shell 1 when in use, at least two groups of mounting holes 31 are respectively arranged at two ends of the shell 1 for enhancing the mounting and fixing stability of the shell 1, the top wall of the shell 1 is integrally formed with an inserting column 11, the inserting column 11 is used for matching with an inserting groove 22 on a terminal board 2, so that the two terminals 2 and the shell 1 are tightly mounted, the top end of the shell 1 is inserted with the terminal board 2, the bottom end of the terminal board 2 is provided with an inserting groove 22, the inserting groove 22 is used for matching with the inserting column 11 on the shell 1, the shell 1 and the terminal board 2 are tightly installed, the inserting column 11 is inserted in the inner wall of the inserting groove 22, the terminal board 2 is provided with a first internal thread hole 21, the first internal thread hole 21 is used for conveniently connecting the terminal, the shell 1 is internally provided with a first winding ring 82 and a second winding ring 62, the first winding ring 82 and the second winding ring 62 have the same structure, the first winding ring 82 is also provided with a spring groove, a lead is wound along the spring groove to form a first winding 61, the outer wall of the shell is wound with a second winding 81, the second winding ring 62 is provided with a spring groove 621, the spring groove 621 is wound with the first winding 61, the first winding 61 is formed by winding the lead along the spring groove 621, so that the winding precision is high and the displacement cannot occur, the first winding 61 and the second winding 81 are formed by winding the same lead, a first mandrel 8 is arranged in the first winding ring 82, and a second mandrel 6 is arranged in the second winding ring 62, the bottom end of the shell 1 is fixedly connected with a bottom plate 3, the bottom plate 3 is used for supporting and protecting a heat-conducting silica gel filler 5, the bottom plate 3 is made of a material with good heat-conducting property and can be made of copper or aluminum, a second internal threaded hole 32 is formed in the bottom end of the bottom plate 3, the shell 1 is filled with the heat-conducting silica gel filler 5, and the first winding ring 82 and the second winding ring 62 are both located in the heat-conducting silica gel filler 5;

install baffle 4 through the bolt in 3 bottoms of bottom plate, baffle 4's effect shelters from heat dissipation stick 34, avoid heat dissipation stick 34 to expose outside, the enhanced security nature, third internal thread hole 43 and nut groove 42 have all been seted up at baffle 4 both ends, the effect of third internal thread hole 43 is in coordination with second internal thread hole 32, use the bolt to fix baffle 4 and bottom plate 3 together, 3 bottom equidistance integrated into one piece of bottom plate are equipped with heat dissipation stick 34, the effect of heat dissipation stick 34 is the exterior surface area of increase bottom plate 3, thereby increased with external contact area, with dispel the heat better, heat dissipation stick 34 all is located cavity 33, through-hole 41 has been seted up to the equidistance on the baffle 4, the effect of through-hole 41 is so that the heat in the cavity 33 can dispel the heat, be equipped with cavity 33 between baffle 4 and the bottom plate 3.

In specific use, a wire is wound along the spring-shaped groove 621 of the second winding ring 62 to form the first winding 61, and then the wire is wound along the spring-shaped groove of the first winding ring 82 to form the second winding 81, wherein the first winding 61 and the second winding 81 are respectively wound along the spring-shaped groove 621 of the second winding ring 62 and the spring-shaped groove of the first winding ring 82; placing the first core rod 8 into the first winding ring 82, placing the second core rod 6 into the second winding ring 62, covering the terminal board 2 on the top end of the shell 1, inserting the splicing column 11 on the shell 1 into the splicing groove 22 of the terminal board 2, and filling the shell 1 with heat-conducting silica gel to form a heat-conducting silica gel filler 5; the partition plate 4 is mounted to the bottom of the bottom plate 3 by bolts through the second and third internally threaded

holes

32 and 43; the heat generated by the first core rod 8, the second winding 81, the first winding ring 82, the second core rod 6, the first winding 61 and the second winding ring 62 is transmitted to the heat-conducting silica gel filler 5, then transmitted to the bottom plate 3, and further transmitted to the outside, so that the heat dissipation of the first core rod 8, the second winding 81, the first winding ring 82, the second core rod 6, the first winding 61 and the second winding ring 62 is realized.

While the invention has been described above with reference to an embodiment, various modifications may be made and equivalents may be substituted for elements thereof without departing from the scope of the invention. In particular, as long as there is no structural conflict, the various features of the disclosed embodiments of the present invention can be used in any combination with each other, and the non-exhaustive description of these combinations in this specification is merely for the sake of brevity and resource conservation. Therefore, it is intended that the invention not be limited to the particular embodiments disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

Claims

1. The utility model provides an outer wound current transformer that winding precision is high, includes casing (1), its characterized in that: a terminal board (2) is inserted at the top end of the shell (1), a first internal thread hole (21) is arranged on the terminal board (2), a first winding ring (82) and a second winding ring (62) are arranged in the shell (1), a spring-shaped groove (621) is formed on the second winding ring (62), a first winding (61) is wound on the spring-shaped groove (621), a first core rod (8) is arranged in the first winding ring (82), a second core rod (6) is arranged in the second winding ring (62), the bottom end of the shell (1) is fixedly connected with a bottom plate (3), the shell (1) is filled with a heat-conducting silica gel filler (5), the first winding ring (82) and the second winding ring (62) are both positioned in the heat-conducting silica gel filler (5), the first winding ring (82) and the second winding ring (62) have the same structure, and a second winding (81) is wound on the outer wall;

baffle (4) are installed through the bolt in bottom plate (3) bottom, equidistant integrated into one piece in bottom plate (3) bottom is equipped with heat dissipation stick (34), through-hole (41) have been seted up to equidistant on baffle (4).

2. The externally wound current transformer with high winding precision as claimed in claim 1, wherein the top wall of the housing (1) is integrally formed with a plug-in post (11), the bottom end of the terminal board (2) is provided with a plug-in groove (22), and the plug-in post (11) is plugged in the inner wall of the plug-in groove (22).

3. An externally wound current transformer with high winding accuracy according to claim 1, characterized in that the first winding (61) and the second winding (81) are wound by the same wire.

4. The outward wound current transformer with high winding precision according to claim 1, characterized in that a second internal threaded hole (32) is opened at the bottom end of the bottom plate (3), and a third internal threaded hole (43) and a nut groove (42) are opened at both ends of the partition plate (4).

5. The externally wound current transformer with high winding precision according to claim 1, characterized in that a cavity (33) is arranged between the partition plate (4) and the bottom plate (3), and the heat dissipation rods (34) are all located in the cavity (33).

6. The externally wound current transformer with high winding precision as claimed in claim 1, wherein the housing (1) has mounting holes (31) at both ends.

7. An externally wound current transformer with high winding precision according to claim 1, characterized in that at least two sets of mounting holes (31) are provided at both ends of the housing (1).